Eurokera

Isabelle Marie Chauvel-Melscoet

Marie Jacqueline Monique Comte

Philippe Lehuede

Daniel Louis Gabriel Ricoult

Transparent, essentially colorless and non-diffusing &#x3b2;-quartz glass-ceramics and glass compositions for forming the same have a composition, free of arsenic oxide, antimony oxide and rare earth oxides except for inevitable trace amounts, which contains, expressed as percentages by weight of oxides 62-72% of SiO, 20-23% of AlO, 2.8-5% of LiO, 0.1-0.6% of SnO, 1.9-4% of TiO, 1.6-3% of ZrO, less than 0.4% of MgO, 2.5-6% of ZnO and/or BaO and/or SrO, less than 250 ppm of FeO; and their crystallites present in the &#x3b2;-quartz solid solution have an average size of less than 35 nm. The glass-ceramics exhibit low thermal expansion and are easily obtained at an industrial scale.

Transparent, colorless, tin-fined LAS glass-ceramics with improved microstructure and optical properties

Transparent &#x3b2;-quartz glass-ceramics containing vanadium oxide. Such glass-ceramics have advantageous optical properties including good transmission in the infrared range, low transmission in the visible range, and significant transmission in the blue range for thicknesses of 3 mm. They can be used as materials for cooking top plates.

Growing community of inventors

Bois-le-Roi, France

Isabelle Marie Chauvel-Melscoet